/*!
 * All material copyright ESRI, All Rights Reserved, unless otherwise specified.
 * See https://github.com/Esri/calcite-components/blob/master/LICENSE.md for details.
 * v1.0.0-beta.82
 */
import { proxyCustomElement, HTMLElement, createEvent, h, Host } from '@stencil/core/internal/client';
import { t as toAriaBoolean, f as focusElement } from './dom.js';
import { a as defaultMenuPlacement, f as filterComputedPlacements, C as CSS, u as updatePopper, c as createPopper, p as popperMenuComputedPlacements } from './popper.js';
import { c as createObserver } from './observers.js';
import { u as updateHostInteraction } from './interactive.js';

const SLOTS = {
  dropdownTrigger: "dropdown-trigger"
};

const dropdownCss = "@-webkit-keyframes in{0%{opacity:0}100%{opacity:1}}@keyframes in{0%{opacity:0}100%{opacity:1}}@-webkit-keyframes in-down{0%{opacity:0;-webkit-transform:translate3D(0, -5px, 0);transform:translate3D(0, -5px, 0)}100%{opacity:1;-webkit-transform:translate3D(0, 0, 0);transform:translate3D(0, 0, 0)}}@keyframes in-down{0%{opacity:0;-webkit-transform:translate3D(0, -5px, 0);transform:translate3D(0, -5px, 0)}100%{opacity:1;-webkit-transform:translate3D(0, 0, 0);transform:translate3D(0, 0, 0)}}@-webkit-keyframes in-up{0%{opacity:0;-webkit-transform:translate3D(0, 5px, 0);transform:translate3D(0, 5px, 0)}100%{opacity:1;-webkit-transform:translate3D(0, 0, 0);transform:translate3D(0, 0, 0)}}@keyframes in-up{0%{opacity:0;-webkit-transform:translate3D(0, 5px, 0);transform:translate3D(0, 5px, 0)}100%{opacity:1;-webkit-transform:translate3D(0, 0, 0);transform:translate3D(0, 0, 0)}}@-webkit-keyframes in-scale{0%{opacity:0;-webkit-transform:scale3D(0.95, 0.95, 1);transform:scale3D(0.95, 0.95, 1)}100%{opacity:1;-webkit-transform:scale3D(1, 1, 1);transform:scale3D(1, 1, 1)}}@keyframes in-scale{0%{opacity:0;-webkit-transform:scale3D(0.95, 0.95, 1);transform:scale3D(0.95, 0.95, 1)}100%{opacity:1;-webkit-transform:scale3D(1, 1, 1);transform:scale3D(1, 1, 1)}}:root{--calcite-animation-timing:calc(150ms * var(--calcite-internal-duration-factor));--calcite-internal-duration-factor:var(--calcite-duration-factor, 1);--calcite-internal-animation-timing-fast:calc(100ms * var(--calcite-internal-duration-factor));--calcite-internal-animation-timing-medium:calc(200ms * var(--calcite-internal-duration-factor));--calcite-internal-animation-timing-slow:calc(300ms * var(--calcite-internal-duration-factor))}.calcite-animate{opacity:0;-webkit-animation-fill-mode:both;animation-fill-mode:both;-webkit-animation-duration:var(--calcite-animation-timing);animation-duration:var(--calcite-animation-timing)}.calcite-animate__in{-webkit-animation-name:in;animation-name:in}.calcite-animate__in-down{-webkit-animation-name:in-down;animation-name:in-down}.calcite-animate__in-up{-webkit-animation-name:in-up;animation-name:in-up}.calcite-animate__in-scale{-webkit-animation-name:in-scale;animation-name:in-scale}:root{--calcite-popper-transition:var(--calcite-animation-timing)}:host([hidden]){display:none}:host{display:-ms-inline-flexbox;display:inline-flex;-ms-flex:0 1 auto;flex:0 1 auto}:host([disabled]){pointer-events:none;cursor:default;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;opacity:var(--calcite-ui-opacity-disabled)}:host([disabled]) ::slotted([calcite-hydrated][disabled]),:host([disabled]) [calcite-hydrated][disabled]{opacity:1}:host .calcite-dropdown-wrapper{display:block;position:absolute;z-index:900;-webkit-transform:scale(0);transform:scale(0);visibility:hidden;pointer-events:none}.calcite-dropdown-wrapper .calcite-popper-anim{position:relative;z-index:1;-webkit-transition:var(--calcite-popper-transition);transition:var(--calcite-popper-transition);visibility:hidden;-webkit-transition-property:visibility, opacity, -webkit-transform;transition-property:visibility, opacity, -webkit-transform;transition-property:transform, visibility, opacity;transition-property:transform, visibility, opacity, -webkit-transform;opacity:0;-webkit-box-shadow:0 0 16px 0 rgba(0, 0, 0, 0.16);box-shadow:0 0 16px 0 rgba(0, 0, 0, 0.16);border-radius:0.25rem}.calcite-dropdown-wrapper[data-popper-placement^=bottom] .calcite-popper-anim{-webkit-transform:translateY(-5px);transform:translateY(-5px)}.calcite-dropdown-wrapper[data-popper-placement^=top] .calcite-popper-anim{-webkit-transform:translateY(5px);transform:translateY(5px)}.calcite-dropdown-wrapper[data-popper-placement^=left] .calcite-popper-anim{-webkit-transform:translateX(5px);transform:translateX(5px)}.calcite-dropdown-wrapper[data-popper-placement^=right] .calcite-popper-anim{-webkit-transform:translateX(-5px);transform:translateX(-5px)}.calcite-dropdown-wrapper[data-popper-placement] .calcite-popper-anim--active{opacity:1;visibility:visible;-webkit-transform:translate(0);transform:translate(0)}:host([active]) .calcite-dropdown-wrapper{pointer-events:initial;visibility:visible}:host .calcite-dropdown-content{width:auto;overflow-y:auto;overflow-x:hidden;background-color:var(--calcite-ui-foreground-1);max-height:90vh;width:var(--calcite-dropdown-width)}.calcite-dropdown-trigger-container{position:relative;display:-ms-flexbox;display:flex;-ms-flex:1 1 auto;flex:1 1 auto}:host([width=s]){--calcite-dropdown-width:12rem}:host([width=m]){--calcite-dropdown-width:14rem}:host([width=l]){--calcite-dropdown-width:16rem}";

const Dropdown = /*@__PURE__*/ proxyCustomElement(class extends HTMLElement {
  constructor() {
    super();
    this.__registerHost();
    this.__attachShadow();
    this.calciteDropdownSelect = createEvent(this, "calciteDropdownSelect", 7);
    this.calciteDropdownOpen = createEvent(this, "calciteDropdownOpen", 7);
    this.calciteDropdownClose = createEvent(this, "calciteDropdownClose", 7);
    //--------------------------------------------------------------------------
    //
    //  Public Properties
    //
    //--------------------------------------------------------------------------
    /** Opens or closes the dropdown */
    this.active = false;
    /**
     allow the dropdown to remain open after a selection is made
     if the selection-mode of the selected item's containing group is "none", the dropdown will always close
     */
    this.disableCloseOnSelect = false;
    /** is the dropdown disabled  */
    this.disabled = false;
    /**
     specify the maximum number of calcite-dropdown-items to display before showing the scroller, must be greater than 0 -
     this value does not include groupTitles passed to calcite-dropdown-group
    */
    this.maxItems = 0;
    /** Describes the type of positioning to use for the overlaid content. If your element is in a fixed container, use the 'fixed' value. */
    this.overlayPositioning = "absolute";
    /**
     * Determines where the dropdown will be positioned relative to the button.
     * @default "bottom-leading"
     */
    this.placement = defaultMenuPlacement;
    /** specify the scale of dropdown, defaults to m */
    this.scale = "m";
    /**
     * **read-only** The currently selected items
     *
     * @readonly
     */
    this.selectedItems = [];
    /** specify whether the dropdown is opened by hover or click of a trigger element */
    this.type = "click";
    /** specify the width of dropdown, defaults to m */
    this.width = "m";
    this.items = [];
    this.groups = [];
    this.activeTransitionProp = "visibility";
    this.mutationObserver = createObserver("mutation", () => this.updateItems());
    this.resizeObserver = createObserver("resize", () => this.setMaxScrollerHeight());
    //--------------------------------------------------------------------------
    //
    //  Private Methods
    //
    //--------------------------------------------------------------------------
    this.setFilteredPlacements = () => {
      const { el, flipPlacements } = this;
      this.filteredFlipPlacements = flipPlacements
        ? filterComputedPlacements(flipPlacements, el)
        : null;
    };
    this.updateTriggers = (event) => {
      this.triggers = event.target.assignedElements({
        flatten: true
      });
      this.reposition();
    };
    this.updateItems = () => {
      this.items = this.groups
        .map((group) => Array.from(group === null || group === void 0 ? void 0 : group.querySelectorAll("calcite-dropdown-item")))
        .reduce((previousValue, currentValue) => [...previousValue, ...currentValue], []);
      this.updateSelectedItems();
      this.reposition();
    };
    this.updateGroups = (event) => {
      const groups = event.target
        .assignedElements({ flatten: true })
        .filter((el) => el === null || el === void 0 ? void 0 : el.matches("calcite-dropdown-group"));
      this.groups = groups;
      this.updateItems();
    };
    this.setMaxScrollerHeight = () => {
      const { active, scrollerEl } = this;
      if (!scrollerEl || !active) {
        return;
      }
      this.reposition();
      const maxScrollerHeight = this.getMaxScrollerHeight();
      scrollerEl.style.maxHeight = maxScrollerHeight > 0 ? `${maxScrollerHeight}px` : "";
      this.reposition();
    };
    this.setScrollerEl = (scrollerEl) => {
      this.resizeObserver.observe(scrollerEl);
      this.scrollerEl = scrollerEl;
    };
    this.transitionEnd = (event) => {
      if (event.propertyName === this.activeTransitionProp) {
        this.active ? this.calciteDropdownOpen.emit() : this.calciteDropdownClose.emit();
      }
    };
    this.setReferenceEl = (el) => {
      this.referenceEl = el;
    };
    this.setMenuEl = (el) => {
      this.menuEl = el;
    };
    this.keyDownHandler = (e) => {
      const target = e.target;
      if (target !== this.referenceEl) {
        return;
      }
      const key = e.key;
      if (this.active && (key === "Escape" || (e.shiftKey && key === "Tab"))) {
        this.closeCalciteDropdown();
        return;
      }
      switch (key) {
        case " ":
        case "Enter":
          this.openCalciteDropdown();
          break;
        case "Escape":
          this.closeCalciteDropdown();
          break;
      }
    };
    this.focusOnFirstActiveOrFirstItem = () => {
      this.getFocusableElement(this.items.find((item) => item.active) || this.items[0]);
    };
    this.toggleOpenEnd = () => {
      this.focusOnFirstActiveOrFirstItem();
      this.el.removeEventListener("calciteDropdownOpen", this.toggleOpenEnd);
    };
    this.openCalciteDropdown = () => {
      this.active = !this.active;
      if (this.active) {
        this.el.addEventListener("calciteDropdownOpen", this.toggleOpenEnd);
      }
    };
  }
  activeHandler() {
    if (!this.disabled) {
      this.reposition();
      return;
    }
    this.active = false;
  }
  handleDisabledChange(value) {
    if (!value) {
      this.active = false;
    }
  }
  flipPlacementsHandler() {
    this.setFilteredPlacements();
  }
  maxItemsHandler() {
    this.setMaxScrollerHeight();
  }
  placementHandler() {
    this.reposition();
  }
  //--------------------------------------------------------------------------
  //
  //  Lifecycle
  //
  //--------------------------------------------------------------------------
  connectedCallback() {
    var _a;
    (_a = this.mutationObserver) === null || _a === void 0 ? void 0 : _a.observe(this.el, { childList: true, subtree: true });
    this.createPopper();
    this.setFilteredPlacements();
  }
  componentDidLoad() {
    this.reposition();
  }
  componentDidRender() {
    updateHostInteraction(this);
  }
  disconnectedCallback() {
    var _a, _b;
    (_a = this.mutationObserver) === null || _a === void 0 ? void 0 : _a.disconnect();
    (_b = this.resizeObserver) === null || _b === void 0 ? void 0 : _b.disconnect();
    this.destroyPopper();
  }
  render() {
    const { active } = this;
    return (h(Host, null, h("div", { class: "calcite-dropdown-trigger-container", onClick: this.openCalciteDropdown, onKeyDown: this.keyDownHandler, ref: this.setReferenceEl }, h("slot", { "aria-expanded": toAriaBoolean(active), "aria-haspopup": "true", name: SLOTS.dropdownTrigger, onSlotchange: this.updateTriggers })), h("div", { "aria-hidden": toAriaBoolean(!active), class: "calcite-dropdown-wrapper", ref: this.setMenuEl }, h("div", { class: {
        ["calcite-dropdown-content"]: true,
        [CSS.animation]: true,
        [CSS.animationActive]: active
      }, onTransitionEnd: this.transitionEnd, ref: this.setScrollerEl }, h("div", { hidden: !this.active }, h("slot", { onSlotchange: this.updateGroups }))))));
  }
  //--------------------------------------------------------------------------
  //
  //  Public Methods
  //
  //--------------------------------------------------------------------------
  /** Updates the position of the component. */
  async reposition() {
    const { popper, menuEl, placement } = this;
    const modifiers = this.getModifiers();
    popper
      ? await updatePopper({
        el: menuEl,
        modifiers,
        placement,
        popper
      })
      : this.createPopper();
  }
  closeCalciteDropdownOnClick(e) {
    if (!this.active || e.composedPath().includes(this.el)) {
      return;
    }
    this.closeCalciteDropdown(false);
  }
  closeCalciteDropdownOnEvent() {
    this.closeCalciteDropdown();
  }
  closeCalciteDropdownOnOpenEvent(e) {
    if (e.composedPath().includes(this.el)) {
      return;
    }
    this.active = false;
  }
  mouseEnterHandler() {
    if (this.type === "hover") {
      this.openCalciteDropdown();
    }
  }
  mouseLeaveHandler() {
    if (this.type === "hover") {
      this.closeCalciteDropdown();
    }
  }
  calciteDropdownItemKeyEvent(e) {
    const { keyboardEvent } = e.detail;
    // handle edge
    const target = keyboardEvent.target;
    const itemToFocus = target.nodeName !== "A" ? target : target.parentNode;
    const isFirstItem = this.itemIndex(itemToFocus) === 0;
    const isLastItem = this.itemIndex(itemToFocus) === this.items.length - 1;
    switch (keyboardEvent.key) {
      case "Tab":
        if (isLastItem && !keyboardEvent.shiftKey) {
          this.closeCalciteDropdown();
        }
        else if (isFirstItem && keyboardEvent.shiftKey) {
          this.closeCalciteDropdown();
        }
        else if (keyboardEvent.shiftKey) {
          this.focusPrevItem(itemToFocus);
        }
        else {
          this.focusNextItem(itemToFocus);
        }
        break;
      case "ArrowDown":
        this.focusNextItem(itemToFocus);
        break;
      case "ArrowUp":
        this.focusPrevItem(itemToFocus);
        break;
      case "Home":
        this.focusFirstItem();
        break;
      case "End":
        this.focusLastItem();
        break;
    }
    e.stopPropagation();
  }
  handleItemSelect(event) {
    this.updateSelectedItems();
    event.stopPropagation();
    this.calciteDropdownSelect.emit();
    if (!this.disableCloseOnSelect ||
      event.detail.requestedDropdownGroup.selectionMode === "none") {
      this.closeCalciteDropdown();
    }
  }
  getModifiers() {
    const flipModifier = {
      name: "flip",
      enabled: true
    };
    flipModifier.options = {
      fallbackPlacements: this.filteredFlipPlacements || popperMenuComputedPlacements
    };
    const eventListenerModifier = {
      name: "eventListeners",
      enabled: this.active
    };
    return [flipModifier, eventListenerModifier];
  }
  createPopper() {
    this.destroyPopper();
    const { menuEl, referenceEl, placement, overlayPositioning } = this;
    const modifiers = this.getModifiers();
    this.popper = createPopper({
      el: menuEl,
      modifiers,
      overlayPositioning,
      placement,
      referenceEl
    });
  }
  destroyPopper() {
    const { popper } = this;
    if (popper) {
      popper.destroy();
    }
    this.popper = null;
  }
  updateSelectedItems() {
    this.selectedItems = this.items.filter((item) => item.active);
  }
  getMaxScrollerHeight() {
    const { maxItems } = this;
    let itemsToProcess = 0;
    let maxScrollerHeight = 0;
    let groupHeaderHeight;
    this.groups.forEach((group) => {
      if (maxItems > 0 && itemsToProcess < maxItems) {
        Array.from(group.children).forEach((item, index) => {
          if (index === 0) {
            if (isNaN(groupHeaderHeight)) {
              groupHeaderHeight = item.offsetTop;
            }
            maxScrollerHeight += groupHeaderHeight;
          }
          if (itemsToProcess < maxItems) {
            maxScrollerHeight += item.offsetHeight;
            itemsToProcess += 1;
          }
        });
      }
    });
    return maxScrollerHeight;
  }
  closeCalciteDropdown(focusTrigger = true) {
    this.active = false;
    if (focusTrigger) {
      focusElement(this.triggers[0]);
    }
  }
  focusFirstItem() {
    const firstItem = this.items[0];
    this.getFocusableElement(firstItem);
  }
  focusLastItem() {
    const lastItem = this.items[this.items.length - 1];
    this.getFocusableElement(lastItem);
  }
  focusNextItem(e) {
    const index = this.itemIndex(e);
    const nextItem = this.items[index + 1] || this.items[0];
    this.getFocusableElement(nextItem);
  }
  focusPrevItem(e) {
    const index = this.itemIndex(e);
    const prevItem = this.items[index - 1] || this.items[this.items.length - 1];
    this.getFocusableElement(prevItem);
  }
  itemIndex(e) {
    return this.items.indexOf(e);
  }
  getFocusableElement(item) {
    if (!item) {
      return;
    }
    const target = item.attributes.isLink
      ? item.shadowRoot.querySelector("a")
      : item;
    focusElement(target);
  }
  get el() { return this; }
  static get watchers() { return {
    "active": ["activeHandler"],
    "disabled": ["handleDisabledChange"],
    "flipPlacements": ["flipPlacementsHandler"],
    "maxItems": ["maxItemsHandler"],
    "placement": ["placementHandler"]
  }; }
  static get style() { return dropdownCss; }
}, [1, "calcite-dropdown", {
    "active": [1540],
    "disableCloseOnSelect": [516, "disable-close-on-select"],
    "disabled": [516],
    "flipPlacements": [16],
    "maxItems": [2, "max-items"],
    "overlayPositioning": [1, "overlay-positioning"],
    "placement": [513],
    "scale": [513],
    "selectedItems": [1040],
    "type": [513],
    "width": [513],
    "reposition": [64]
  }, [[8, "click", "closeCalciteDropdownOnClick"], [0, "calciteDropdownCloseRequest", "closeCalciteDropdownOnEvent"], [8, "calciteDropdownOpen", "closeCalciteDropdownOnOpenEvent"], [1, "mouseenter", "mouseEnterHandler"], [1, "mouseleave", "mouseLeaveHandler"], [0, "calciteDropdownItemKeyEvent", "calciteDropdownItemKeyEvent"], [0, "calciteDropdownItemSelect", "handleItemSelect"]]]);
function defineCustomElement() {
  if (typeof customElements === "undefined") {
    return;
  }
  const components = ["calcite-dropdown"];
  components.forEach(tagName => { switch (tagName) {
    case "calcite-dropdown":
      if (!customElements.get(tagName)) {
        customElements.define(tagName, Dropdown);
      }
      break;
  } });
}
defineCustomElement();

export { Dropdown as D, defineCustomElement as d };